US PATENT SUBCLASS 516 / 52
.~.~ The agent contains specified solid non-bituminous particulate (e.g., clay)

Current as of: June, 1999
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516 /   HD   COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF

9  DF  CONTINUOUS LIQUID OR SUPERCRITICAL PHASE: COLLOID SYSTEMS; COMPOSITIONS CONTAINING AN AGENT FOR MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF PREPARING THE COMPOSITIONS (E.G., THICKENING AGENT; PROTECTIVE COLLOID AGENT; COMPOSITION CONTAINING AN EMULSIFYING AGENT WITH NO DISPERSANT* DISCLOSED; ORGANIC LIQUID EMULSIFIED IN ANHYDROUS HF) {5}
38  DF  .~ Aqueous continuous liquid phase and discontinuous phase primarily bituminous (e.g., asphalt, pitch, tar, montan wax, paraffin wax), or coal, or elemental Carbon {6}
52.~.~ The agent contains specified solid non-bituminous particulate (e.g., clay)

DEFINITION

Classification: 516/52

The agent contains specified solid nonbituminous particulate (e.g., clay):

(under subclass 46) Subject matter in which the colloid

system making or stabilizing agent* contains a specified solid, nonbituminous particulate material*, such as clay.

SEE OR SEARCH CLASS

508, Solid Antifriction Devices, Material Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions, appropriate subclasses for claimed or solely disclosed lubricants composed of suspension which may be colloid systems, see

136+, for compositions which are miscellaneous mineral oil compositions, or are lubricants or separants for moving solid surfaces, which contain silicon dioxide, silicic acid, orthosilicate, or metasilicate (e.g., clays, onium clays, estersils, etc.) which may be surface-treated. This class is organized based upon the chemical constituents or chemical reactants of the composition or device; no subclass specifically provides for colloid systems or wetting agents, therefore such subject matter would be placed based upon its constituents as though it were a solution or mixture having no colloid system characteristic.